We run three 15 minute nitro mains each club race day instead of multiple qualifying rounds - way more fun by the way. Usually only have 1 or 2 pit guys for everyone to maximize the number of marshals. We all come in quick at the end of warm-up for fuel and then do a standing start on the track with the faster guys at the back and we are not too picky about the line-up. There is lots of time between the 6 and 10 minute mark for everyone to come in for fuel without the pit guys getting overloaded. Drivers just call down when they are coming in - our pit lane has numbered fuel bottle holders to make it easier. Pit guys are sometimes busy running around when someone flames out but for the most part it works fine for us.